magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
OtherLiveeip155:8453Exactvia cdp
Astct-crsCrsHematologyCar-tGrading
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 10 snapshots so far.
$13.75
Verified settled volume
2,750 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-31 13:41Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x836Be278f1739fB4308091cD1852F7971Bc19Ee2The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "PAYMENT-SIGNATURE header is required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"paymentFlow": "upfront",
"resourceUrl": "https://api.magentlab.com/api/calc/astct_crs",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
},
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"withdrawDelay": 86400,
"receiverAuthorizer": "0x3721824a31197dcDD2984cF43b92B6cc8A87c0Fb",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "batch-settlement",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
],
"resource": {
"url": "https://api.magentlab.com/api/calc/astct_crs",
"tags": [
"astct-crs",
"crs",
"hematology",
"car-t",
"grading"
],
"mimeType": "application/json",
"description": "Lee 2019 ASTCT CRS Table 1 grade 0-4. Fever (>=38 C, not another cause) with both axes none is grade 1. fever_waived after antipyretic, tocilizumab, or steroids. Grade is the more severe of hypotension (none / no_vasopressors / one_vasopressor / multiple_vasopressors) vs hypoxia (none / low_flow / high_flow / positive_pressure). Organ toxicities do not influence grade. Not ICANS. magent does not measure temperature or start vasopressors.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"fever": true,
"hypoxia": "none",
"hypotension": "none",
"fever_waived": false
}
},
"output": {
"type": "json",
"example": {
"crs": true,
"fever": true,
"grade": 1,
"formula": "astct_crs",
"hypoxia": "none",
"citation": {
"id": "lee-2019",
"doi": "10.1016/j.bbmt.2018.12.758",
"pmid": "30592986",
"title": "ASTCT Consensus Grading for Cytokine Release Syndrome and Neurologic Toxicity Associated with Immune Effector Cells",
"source": "Biol Blood Marrow Transplant. 2019;25(4):625-638",
"authors": "Lee DW, Santomasso BD, Locke FL, Ghobadi A, Turtle CJ, Brudno JN, Maus MV, Park JH, Mead E, Pavletic S, Go WY, Eldjerou L, Gardner RA, Frey N, Curran KJ, Peggs K, Pasquini M, DiPersio JF, van den Brink MRM, Komanduri KV, Grupp SA, Neelapu SS"
},
"criteria": [
{
"met": true,
"factor": "fever_or_waived"
},
{
"met": true,
"value": "none",
"factor": "hypotension_none"
},
{
"met": false,
"factor": "hypotension_no_vasopressors"
},
{
"met": false,
"factor": "hypotension_one_vasopressor"
},
{
"met": false,
"factor": "hypotension_multiple_vasopressors"
},
{
"met": true,
"value": "none",
"factor": "hypoxia_none"
},
{
"met": false,
"factor": "hypoxia_low_flow"
},
{
"met": false,
"factor": "hypoxia_high_flow"
},
{
"met": false,
"factor": "hypoxia_positive_pressure"
}
],
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"hypotension": "none",
"fever_waived": false,
"hypoxia_grade": 0,
"hypotension_grade": 0,
"formula_expression": "Lee 2019 ASTCT CRS Table 1. fever is temperature ≥38°C not attributable to another cause. fever_waived true if CRS already treated with antipyretic/tocilizumab/steroids so fever is no longer required. hypotension none | no_vasopressors | one_vasopressor (with or without vasopressin) | multiple_vasopressors (excluding vasopressin). hypoxia none | low_flow (≤6 L/min nasal cannula or blow-by) | high_flow (>6 L/min, facemask, NRB, or Venturi) | positive_pressure (CPAP/BiPAP/intubation). Grade is the more severe of hypotension vs hypoxia: both none → 1 if fever or fever_waived else 0 (crs false); no_vasopressors or low_flow → 2; one_vasopressor or high_flow → 3; multiple_vasopressors or positive_pressure → 4. Organ toxicities do not influence grade. Not ICANS"
}
},
"iconUrl": "https://api.magentlab.com/favicon.ico"
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"headers": {
"type": "object",
"additionalProperties": {
"type": "string"
}
},
"queryParams": {
"type": "object",
"required": [
"fever",
"fever_waived",
"hypotension",
"hypoxia"
],
"properties": {
"fever": {
"type": "boolean",
"description": "Fever as assigned by the caller (Lee 2019 ASTCT CRS Table 1): temperature ≥38°C not attributable to another cause. true or false. Required unless fever_waived is true when hypotension or hypoxia is not none. magent does not measure temperature."
},
"hypoxia": {
"enum": [
"none",
"low_flow",
"high_flow",
"positive_pressure"
],
"type": "string",
"description": "Lee 2019 Table 1 hypoxia as assigned by the caller: none; low_flow (≤6 L/min nasal cannula or blow-by, grade 2); high_flow (>6 L/min nasal cannula, facemask, nonrebreather, or Venturi, grade 3); positive_pressure (CPAP, BiPAP, or intubation and mechanical ventilation, grade 4). magent does not set oxygen or ventilator mode."
},
"hypotension": {
"enum": [
"none",
"no_vasopressors",
"one_vasopressor",
"multiple_vasopressors"
],
"type": "string",
"description": "Lee 2019 Table 1 hypotension as assigned by the caller: none; no_vasopressors (hypotension not requiring vasopressors, grade 2); one_vasopressor (one vasopressor with or without vasopressin, grade 3); multiple_vasopressors (multiple vasopressors excluding vasopressin, grade 4). magent does not start vasopressors."
},
"fever_waived": {
"type": "boolean",
"description": "true if CRS was already treated with antipyretic, tocilizumab, or steroids so fever is no longer required to grade subsequent CRS (Lee 2019). false otherwise. magent does not start those therapies."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x836B…19Ee2. The signed payment is good for 10 minutes.
- Paid to
- 0x836B…19Ee2
- USD Coin contract
- 0x8335…02913
- Payment window
- 10 minutes
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"paymentFlow": "upfront",
"resourceUrl": "https://api.magentlab.com/api/calc/astct_crs",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"fever": true,
"hypoxia": "none",
"hypotension": "none",
"fever_waived": false
},
{
"fever": true,
"hypoxia": "none",
"hypotension": "none",
"fever_waived": false
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/astct_crs",
"count": 2,
"items": [
{
"crs": true,
"fever": true,
"grade": 1,
"formula": "astct_crs",
"hypoxia": "none",
"citation": {
"id": "lee-2019",
"doi": "10.1016/j.bbmt.2018.12.758",
"pmid": "30592986",
"title": "ASTCT Consensus Grading for Cytokine Release Syndrome and Neurologic Toxicity Associated with Immune Effector Cells",
"source": "Biol Blood Marrow Transplant. 2019;25(4):625-638",
"authors": "Lee DW, Santomasso BD, Locke FL, Ghobadi A, Turtle CJ, Brudno JN, Maus MV, Park JH, Mead E, Pavletic S, Go WY, Eldjerou L, Gardner RA, Frey N, Curran KJ, Peggs K, Pasquini M, DiPersio JF, van den Brink MRM, Komanduri KV, Grupp SA, Neelapu SS"
},
"criteria": [
{
"met": true,
"factor": "fever_or_waived"
},
{
"met": true,
"value": "none",
"factor": "hypotension_none"
},
{
"met": false,
"factor": "hypotension_no_vasopressors"
},
{
"met": false,
"factor": "hypotension_one_vasopressor"
},
{
"met": false,
"factor": "hypotension_multiple_vasopressors"
},
{
"met": true,
"value": "none",
"factor": "hypoxia_none"
},
{
"met": false,
"factor": "hypoxia_low_flow"
},
{
"met": false,
"factor": "hypoxia_high_flow"
},
{
"met": false,
"factor": "hypoxia_positive_pressure"
}
],
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"hypotension": "none",
"fever_waived": false,
"hypoxia_grade": 0,
"hypotension_grade": 0,
"formula_expression": "Lee 2019 ASTCT CRS Table 1. fever is temperature ≥38°C not attributable to another cause. fever_waived true if CRS already treated with antipyretic/tocilizumab/steroids so fever is no longer required. hypotension none | no_vasopressors | one_vasopressor (with or without vasopressin) | multiple_vasopressors (excluding vasopressin). hypoxia none | low_flow (≤6 L/min nasal cannula or blow-by) | high_flow (>6 L/min, facemask, NRB, or Venturi) | positive_pressure (CPAP/BiPAP/intubation). Grade is the more severe of hypotension vs hypoxia: both none → 1 if fever or fever_waived else 0 (crs false); no_vasopressors or low_flow → 2; one_vasopressor or high_flow → 3; multiple_vasopressors or positive_pressure → 4. Organ toxicities do not influence grade. Not ICANS"
},
{
"crs": true,
"fever": true,
"grade": 1,
"formula": "astct_crs",
"hypoxia": "none",
"citation": {
"id": "lee-2019",
"doi": "10.1016/j.bbmt.2018.12.758",
"pmid": "30592986",
"title": "ASTCT Consensus Grading for Cytokine Release Syndrome and Neurologic Toxicity Associated with Immune Effector Cells",
"source": "Biol Blood Marrow Transplant. 2019;25(4):625-638",
"authors": "Lee DW, Santomasso BD, Locke FL, Ghobadi A, Turtle CJ, Brudno JN, Maus MV, Park JH, Mead E, Pavletic S, Go WY, Eldjerou L, Gardner RA, Frey N, Curran KJ, Peggs K, Pasquini M, DiPersio JF, van den Brink MRM, Komanduri KV, Grupp SA, Neelapu SS"
},
"criteria": [
{
"met": true,
"factor": "fever_or_waived"
},
{
"met": true,
"value": "none",
"factor": "hypotension_none"
},
{
"met": false,
"factor": "hypotension_no_vasopressors"
},
{
"met": false,
"factor": "hypotension_one_vasopressor"
},
{
"met": false,
"factor": "hypotension_multiple_vasopressors"
},
{
"met": true,
"value": "none",
"factor": "hypoxia_none"
},
{
"met": false,
"factor": "hypoxia_low_flow"
},
{
"met": false,
"factor": "hypoxia_high_flow"
},
{
"met": false,
"factor": "hypoxia_positive_pressure"
}
],
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"hypotension": "none",
"fever_waived": false,
"hypoxia_grade": 0,
"hypotension_grade": 0,
"formula_expression": "Lee 2019 ASTCT CRS Table 1. fever is temperature ≥38°C not attributable to another cause. fever_waived true if CRS already treated with antipyretic/tocilizumab/steroids so fever is no longer required. hypotension none | no_vasopressors | one_vasopressor (with or without vasopressin) | multiple_vasopressors (excluding vasopressin). hypoxia none | low_flow (≤6 L/min nasal cannula or blow-by) | high_flow (>6 L/min, facemask, NRB, or Venturi) | positive_pressure (CPAP/BiPAP/intubation). Grade is the more severe of hypotension vs hypoxia: both none → 1 if fever or fever_waived else 0 (crs false); no_vasopressors or low_flow → 2; one_vasopressor or high_flow → 3; multiple_vasopressors or positive_pressure → 4. Organ toxicities do not influence grade. Not ICANS"
}
]
}
},
"iconUrl": "https://api.magentlab.com/favicon.ico"
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"body": {
"type": "object",
"required": [
"items"
],
"properties": {
"items": {
"type": "array",
"items": {
"type": "object",
"required": [
"fever",
"fever_waived",
"hypotension",
"hypoxia"
],
"properties": {
"fever": {
"type": "boolean",
"description": "Fever as assigned by the caller (Lee 2019 ASTCT CRS Table 1): temperature ≥38°C not attributable to another cause. true or false. Required unless fever_waived is true when hypotension or hypoxia is not none. magent does not measure temperature."
},
"hypoxia": {
"enum": [
"none",
"low_flow",
"high_flow",
"positive_pressure"
],
"type": "string",
"description": "Lee 2019 Table 1 hypoxia as assigned by the caller: none; low_flow (≤6 L/min nasal cannula or blow-by, grade 2); high_flow (>6 L/min nasal cannula, facemask, nonrebreather, or Venturi, grade 3); positive_pressure (CPAP, BiPAP, or intubation and mechanical ventilation, grade 4). magent does not set oxygen or ventilator mode."
},
"hypotension": {
"enum": [
"none",
"no_vasopressors",
"one_vasopressor",
"multiple_vasopressors"
],
"type": "string",
"description": "Lee 2019 Table 1 hypotension as assigned by the caller: none; no_vasopressors (hypotension not requiring vasopressors, grade 2); one_vasopressor (one vasopressor with or without vasopressin, grade 3); multiple_vasopressors (multiple vasopressors excluding vasopressin, grade 4). magent does not start vasopressors."
},
"fever_waived": {
"type": "boolean",
"description": "true if CRS was already treated with antipyretic, tocilizumab, or steroids so fever is no longer required to grade subsequent CRS (Lee 2019). false otherwise. magent does not start those therapies."
}
}
},
"maxItems": 25,
"minItems": 1
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"type": "string",
"const": "POST"
},
"headers": {
"type": "object",
"additionalProperties": {
"type": "string"
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-08-31 13:41Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-22 13:15Z
- x402 version
- 2
- Max timeout
- 600s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 10 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service magent and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=magent' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://api.magentlab.com/api/calc/astct_crs, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.